Typical applications and use
- Measurements at very low sound pressurelevels
- Measurements on hard-disk drives, computerproducts, anechoic rooms, quiet rooms, etc
- Sound-power measurements at low levels
The 40HL comprises a special high-sensitive 1/2″ free-field measurement microphone and an integrated 1/2″ low-noise preamplifier. In combination, they connect to most high-quality input modules with LEMO 1B connector.
The preamplifier, a true 1/2″ low-noise amplifIer with LEMO 1B connector, has a built-in compensation filter for free-field microphones.
The 1/2″ microphone is an externally-polarized free field microphone with a specially reduced inherent noise floor in order to achieve a high dynamic range and wide frequency range. Its diaphragm is specially tuned to yield high sensitivity coupled with low internal noise.